Throw the cat in amongst the pigeons and say that not everyone from every social class sees things the same way. One could live in an estate where there's wonderful camaraderie amongst the neighbours, everyone throws in their time , etc, to make sure everything looks and functions well. Then there's an estate where a lot of people do their best, but the few ruin it for everyone else but always want the same benefits without helping out or donating to the upkeep. I can well imagine living next door to neighbours like that changing the way I'd think about semi-d's. I also know of plenty who have similar problems with living in detached houses and uncaring neighbours beside them. Either way it would dim the view of people, especially if the sound-proofing and carelessness of a neighbour became an issue.